Techno Press
You logged in as Techno Press

Computers and Concrete
  Volume 20, Number 1, July 2017, pages 085-97

A physically consistent stress-strain model for actively confined concrete
Sharif Shahbeyk, Mahshid Z. Moghaddam and Mohammad Safarnejad

    With a special attention to the different stages of a typical loading path travelled in a fluid confined concrete test, this paper introduces a physically consistent model for the stress-strain curve of actively confined normal-strength concrete in the axial direction. The model comprises of the five elements of: (1) a criterion for the peak or failure strength, (2) an equation for the peak strain, (3) a backbone hydrostatic curve, (4) a transient hardening curve linking the point of departure from the hydrostatic curve to the failure point, and finally (5) a set of formulas for the post-peak region. Alongside, relevant details and shortcomings of existing models will be discussed in each part. Finally, the accuracy and efficiency of the proposed model have been verified in a set of simulations which compare well with the experimental results from the literature.
Key Words
    active confinement; concrete; failure strength; stress-strain model; hydrostatic response; numerical modeling
Sharif Shahbeyk, Mahshid Z. Moghaddam and Mohammad Safarnejad: Faculty of Civil and Environmental Engineering, Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box 14115-143, Tehran, Iran

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2021 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: